copy, copyin, copyout

Alexej Sokolov at
Tue Nov 25 09:38:20 PST 2008

could anyone please explain to me the difference between functions: 
copystr() and copyinstr() ? 

For i386 copyinstr is implemented in assembler. I can not read
the assembler code very well. 

I tried to allocate a memory in space of user process using vm_map_find
and then with copystr() I could copy data between user and kernel
memory. copystr() seemed to be  able to do the same what copyinstr do. 

% uname -rp
7.0-RELEASE-p5 i386

Alexej Sokolov < at>

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